[Modules] Record side effect info in EvaluatedStmt (#146468) #10957
+77
−63
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
All deserialized VarDecl initializers are EvaluatedStmt, but not all EvaluatedStmt initializers are from a PCH. Calling `VarDecl::hasInitWithSideEffects` can trigger constant evaluation, but it's hard to know ahead of time whether that will trigger deserialization - even if the initializer is fully deserialized, it may contain a call to a constructor whose body is not deserialized. By caching the result of `VarDecl::hasInitWithSideEffects` and populating that cache during deserialization we can guarantee that calling it won't trigger deserialization regardless of the state of the initializer. This also reduces memory usage by removing the `InitSideEffectVars` set in `ASTReader`. rdar://154717930 (cherry picked from commit 2910c24)
|
@swift-ci please test |
|
This subsumes #10945 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
All deserialized VarDecl initializers are EvaluatedStmt, but not all EvaluatedStmt initializers are from a PCH. Calling
VarDecl::hasInitWithSideEffectscan trigger constant evaluation, but it's hard to know ahead of time whether that will trigger deserialization - even if the initializer is fully deserialized, it may contain a call to a constructor whose body is not deserialized. By caching the result ofVarDecl::hasInitWithSideEffectsand populating that cache during deserialization we can guarantee that calling it won't trigger deserialization regardless of the state of the initializer. This also reduces memory usage by removing theInitSideEffectVarsset inASTReader.rdar://154717930
(cherry picked from commit 2910c24)